Express env variable correctly

Author: dpiparo

.github/workflows/python_wheel_build.yml

@@ -64,7 +64,7 @@ jobs:
         env:
             MACOSX_DEPLOYMENT_TARGET: 26.5
         run: |
-            ln -s /Applications/Xcode_${{MACOSX_DEPLOYMENT_TARGET}}.app /Applications/Xcode.app
+            ln -s /Applications/Xcode_${MACOSX_DEPLOYMENT_TARGET}.app /Applications/Xcode.app
             mkdir wheel_creation && cd wheel_creation
             cp -r ../root .
             python3 -m venv root_build_env